ASTROSAT CZTI

Data Quality Report

Orbit 20171116_G08_009T01_9000001696_level2

Creation date: 2025-11-18T09:56:32.246112
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev$

Source files: Data quality report (detailed, human readable) | Data quality report (concise, machine readable)

Observation information


Basic statistics of files

Param Original file Final file
FilenamemodeM0/AS1G08_009T01_9000001696cztM0_level2.fits modeM0/AS1G08_009T01_9000001696cztM0_level2_quad_clean.evt
Size (bytes)658,117,440637,899,840
Size627.6 MB 608.3 MB
Events in quadrant A3,897,0223,693,604
Events in quadrant B3,849,2983,754,351
Events in quadrant C3,990,5283,766,636
Events in quadrant D3,336,9083,250,931

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A014420
B014420
C014420
D014420

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01060
B01060
C01060
D01060

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02122950
B01880110
C01453110
D02062750

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7075750227.097531%
B7075735034.950747%
C707574540.641633%
D7075749456.988708%

Noise dominated fraction

Noise dominated data is calculated using 1-second bins in cleaned event files. If a bin has >2000 counts, and if more than 50% of those come from <1% of pixels, then it is considered to be noise-dominated and hence unusable.

Quadrant # 1 sec bins Bins with >0 counts Bins with >2000 counts High rate bins dominated by noise Noise dominated (total time) Noise dominated (detector-on time) Marked lightcurve
A 81478 70456 0 0 0.00% 0.00%
B 81478 70756 0 0 0.00% 0.00%
C 81478 70759 0 0 0.00% 0.00%
D 81478 70719 0 0 0.00% 0.00%

Top noisy pixels

Top three noisy pixels from each quadrant. If the there are fewer than three noisy pixels in the level2.evt file, extra rows are filled as -1

Pixel properties Quadrant properties
Quadrant DetID PixID Counts Sigma Mean Median Sigma
A 0 29 3764 11.01 1015 949 255.6
A 7 110 3233 8.93 1015 949 255.6
A 0 30 2865 7.49 1015 949 255.6
B 2 9 3325 11.82 1013 964 199.7
B 3 17 2552 7.95 1013 964 199.7
B 5 225 2544 7.91 1013 964 199.7
C 1 81 2908 7.05 1052 975 274.1
C 1 80 2865 6.9 1052 975 274.1
C 2 191 2737 6.43 1052 975 274.1
D 3 14 2452 6.2 954 866 255.8
D 7 3 2395 5.98 954 866 255.8
D 7 5 2394 5.97 954 866 255.8

Detector plane histogram (DPH)

Histogram calculated using DETX and DETY for each event in the final _common_clean file

Quadrant A Quadrant B
Quadrant D Quadrant C

Count rate plots and images

Plot type Count rate plots Images
Comparison with Poisson distribution
Blue bars denote a histogram of data divided into 1 sec bins.
Red curve is a Poisson curve with rate = median count rate of data.
Quadrant-wise count rates
Data is divided into 100 sec bins
Module-wise count rates for Quadrant A
Data is divided into 100 sec bins
Module-wise count rates for Quadrant B
Data is divided into 100 sec bins
Module-wise count rates for Quadrant C
Data is divided into 100 sec bins
Module-wise count rates for Quadrant D
Data is divided into 100 sec bins

Housekeeping plots

Parameter Plot
CZT HV Monitor
D_VDD
Temperature 1
Veto HV Monitor
Veto LLD
Alpha Counter
_CPM_Rate
CZT Counter
+2.5 Volts monitor
+5 Volts monitor
_ROLL_ROT
_Roll_DEC
_Roll_RA
Veto Counter